This book will tell you how to use Linux for unauthorized access to information systems, or, simply put, for hacking. The first part of the book shows how to hack Linux itself - you will get acquainted with the basics of Linux; learn how to hack a local Linux system and gain root rights, talk about various vulnerabilities in the eCryptfs file and folder encryption system; well, in conclusion of the first part, it will be shown how to hack Apache, MySQL, as well as CMS WordPress. The second part of the book will tell you how to use various tools available in Linux to hack other systems (including Linux) - let's get acquainted with the hacker distribution Kali Linux and learn about the best tools from this distribution; we will tell you how to hack an account on a social network; learn to hide your activities with Tor; let's try to hack an Android application using the tools included in Linux and much more.